Number of trades The number of trades used in economic consequence and feasibility evaluations to estimate labor costs for a failure. The maximum number is 5. See Also First trade First trade listed in economic consequence and feasibility evaluations to estimate labor costs for a failure. See Also Second trade Second trade listed in economic consequence and feasibility evaluations to estimate labor costs for a failure. See Also Third trade Third trade listed in economic consequence and feasibility evaluations to estimate labor costs for a failure. See Also